pg_partman SQL injection in undo partition time encoder
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-61818
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 13:00 UTC · Revision 1
Source evidence
pg_partman SQL injection in undo partition time encoder
core-osv · Original sourcePublished 18 Sept 2026, 19:47 UTC
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.
osv:CVE-2026-61818
Complete source record
{
"id": "9491544fe323c3c925e26ba51e86d1975a525a9886ce629a08f8e8436b99b67b",
"url": "https://osv.dev/vulnerability/CVE-2026-61818",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "pg_partman SQL injection in undo partition time encoder",
"summary": "pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.",
"evidence": "osv:CVE-2026-61818",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-61818",
"aliases": [
"CVE-2026-61818",
"GHSA-fm3m-9fh7-mqfc"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/pgpartman/pg_partman",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "f7e83b9c441c7e97066d815bbe14e02a9dc5ff94"
},
{
"fixed": "ba9405542acf24dd881845b935cab8b165854361"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "5.5.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "ba9405542acf24dd881845b935cab8b165854361"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "f7e83b9c441c7e97066d815bbe14e02a9dc5ff94"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v5.5.0"
}
]
}
}
],
"versions": [
"v5.4.3",
"v5.4.2",
"v5.4.1",
"v5.4.0",
"v5.3.1",
"v5.3.0",
"v5.3.0RC1",
"v5.2.4",
"v5.2.3",
"v5.2.2",
"v5.2.1",
"v5.2.0",
"v5.1.0",
"v5.0.1",
"v5.0.0",
"v4.7.1",
"v4.7.0",
"v4.6.2",
"v4.6.1",
"v4.6.0",
"v4.5.1",
"v4.5.0",
"v4.4.1",
"v4.4.0",
"v4.3.1",
"v4.3.0",
"v4.2.2",
"v4.2.1",
"v4.2.0",
"v4.1.0",
"v4.0.0",
"v3.2.1",
"v3.2.0",
"v3.1.3",
"v3.1.2",
"v3.1.1",
"v3.1.0",
"v3.0.2",
"v3.0.1",
"v2.6.4",
"v2.6.3",
"v2.6.2",
"v2.6.1",
"v2.6.0",
"v2.5.1",
"v2.5.0",
"v2.4.1",
"v2.4.0",
"v2.3.4",
"v2.3.3",
"v2.3.2",
"v2.3.1",
"v2.3.0",
"v2.2.3",
"v2.2.2",
"v2.2.1",
"v2.2.0",
"v2.1.0",
"v2.0.0",
"v1.8.7",
"v1.8.6",
"v1.8.5",
"v1.8.4",
"v1.8.3",
"v1.8.2",
"v1.8.1",
"v1.8.0",
"v1.7.2",
"v1.7.1",
"v1.7.0",
"v1.6.1",
"v1.6.0",
"v1.5.1",
"v1.5.0",
"v1.4.5",
"v1.4.4",
"v1.4.3",
"v1.4.1",
"v1.4.0",
"v1.3.0",
"v1.2.0",
"v1.1.0",
"v1.0.0",
"v0.4.2",
"v0.4.1",
"v0.4.0",
"v0.3.2",
"v0.3.1",
"v0.3.0",
"v0.2.0",
"v0.1.2",
"v0.1.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61818.json"
}
}
],
"modified": "2026-10-28T02:30:50.938669923Z",
"provider": "osv",
"references": [
"https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json",
"https://github.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc",
"https://nvd.nist.gov/vuln/detail/CVE-2026-61818",
"https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361"
],
"provider_metadata": {
"cwe_ids": [
"CWE-89"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json"
}
},
"related_cves": [
{
"value": "CVE-2026-61818",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519366,
"published_at": "2026-09-18T19:47:30.083+00:00"
}